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Figure 2-82. Disassemble Air Compressor, First Stage Components
Valve disk

TM-10-4610-232-34 Water Purification Unit Reverse Osmosis 3 000 GPH Trailer Mounted Flatbed Cargo 22-1/2 Ton 8 Wheel Tandem Model No. WTA-060 Manual
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TM 10-4610-232-34 (9)  Use  valve  key  to  remove  discharge  valve  assembly  (l6).  Discharge  valve  assembly  (16)  is  not  reusable  and  must be discarded. (10) (11) (12) (13) (14) Remove cylinder (17) and gasket (18). Carefully rotate crankshaft by hand so that the piston pin (19) of piston (20) is above the level of the crankcase. Remove two snap rings (21). Remove the piston pin (19) and remove piston (20). Using a piston ring expander, remove piston rings (22). If necessary, remove studs (23). WARNING Provide adequate ventilation when using cleaning solvent. Avoid prolonged breath- ing of vapors and minimize skin contact. Solvent is highly flammable. Keep away from sources of heat and open flame. WARNING Do not use more than 30 psig (207 kPa) compressed air for parts cleaning. Keep other workers at a safe distance when cleaning parts with compressed air. a. Clean all parts in solvent and blow dry with compressed air 30 psig (207 kPa) maximum. b. Inspect pistons for scratches, broken areas between rings and general damage. Replace as necessary. c. Inspect cylinders for internal scratches that could cause leaks, and broken exterior fins. Replace as necessary. NOTE The piston and sleeve must be replaced as a set. d.  Check  piston  and  sleeve  assembly  (20,  Figure  2-82)  for  excessive  wear  or  deep  scratches.  Replace  as  necessary. e. Inspect heads and valves for pitting and corrosion. Corrosion in or around valve ports is cause for replacement. f. Inspect intercooler and aftercooler tubes for damage and evidence of leaks. Replace as necessary. g. Inspect all threaded connectors for damage or stripped threads. Replace parts as necessary. h. Inspect drive belts for cuts or cracking. Replace worn or damaged belts. i.  Inspect  rubber  grommets  and  mounting  pads  for  distortion  or  deterioration.  Replace  as  necessary. j. Refer to Table 3-1. Replace any component(s) exceeding clearance or tolerance limits. a.  Assemble  First  Stage  Components: NOTE Slotted ring goes in bottom groove. Ring with machined shoulder around diameter goes in middle groove (with shoulder facing bottom of piston). Solid ring goes in top groove. NOTE Be sure that TOP mark on piston rings is facing upwards and that gaps in piston rings are not directly above piston pins. Gaps in adjacent rings must be at least 90° apart. (1) Use piston ring expander to install piston rings (22, Figure 2-82) on piston (20). (2) Compress rings (22) and install piston (20) into cylinder (17), allowing clearance to install piston pin (19). (3) Install studs (23) and position new gasket (18) on crankcase. 2-234







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